TY - JOUR
T1 - Photocatalytic degradation of methylene blue by UV-assistant TiO2 and natural sericite composites
AU - Huang, Chao Wei
AU - Wu, Min Chien
N1 - Funding Information:
The authors would like to acknowledge I-Chun Lin, the R&D director in Feng Yang Production Co., Ltd, Taiwan for providing natural sericite (ST-3000). The authors also thank the Ministry of Science and Technology (MOST) of Taiwan. The work was supported financially by grant nos MOST 106-2218-E-992-304-MY2 and 108-3116-F-006 -013.
Publisher Copyright:
© 2020 Society of Chemical Industry
PY - 2020/10/1
Y1 - 2020/10/1
N2 - BACKGROUND: In order to prepare an environmental-friendly photocatalyst, natural mineral sericite is used as the substrate of photocatalysts. In this study, the TiO2-sericite composite materials are synthesized by a facile sol-gel process, followed via a calcination treatment that can improve the crystallinity of the nano-sized TiO2. The prepared composites are characterized by XRD, Raman, FTIR, UV-vis, SEM, and BETanalysis. The effects of the molecular ratio of TiO2 to sericite and the calcination temperature are also examined. RESULTS: Sericite is not only served as a substrate for nano-sized TiO2 to fabricate the micro-sized composite materials but also affect the formation of different crystalliniteTiO2. The characteristic results show that the addition of sericite can stabilize the crystal phase of TiO2; therefore, the sericite can maintain the crystalline anatase of TiO2 even after the calcination at 700 °C and 900 °C. Accordingly, the adsorption test and the photocatalytic degradation of methylene blue are conducted to verify the photocatalytic performance of the TiO2-sericite composite materials. It indicates that the synergetic effect of TiO2-sericite composites can facilitate the photocatalytic degradation of TiO2 accompanied by the initial adsorption of methylene blue by sericite. Based on the presence of various radicals, including ·OH, ·O2−, and 1O2, the mechanism of photocatalytic degradation of methylene blue via TiO2-sericite composites are successfully proposed. CONCLUSION: The excellent activity reveals that TiO2-sericite composites are with potential employed as ecological-friendly photocatalysts in the degradation of pollutants.
AB - BACKGROUND: In order to prepare an environmental-friendly photocatalyst, natural mineral sericite is used as the substrate of photocatalysts. In this study, the TiO2-sericite composite materials are synthesized by a facile sol-gel process, followed via a calcination treatment that can improve the crystallinity of the nano-sized TiO2. The prepared composites are characterized by XRD, Raman, FTIR, UV-vis, SEM, and BETanalysis. The effects of the molecular ratio of TiO2 to sericite and the calcination temperature are also examined. RESULTS: Sericite is not only served as a substrate for nano-sized TiO2 to fabricate the micro-sized composite materials but also affect the formation of different crystalliniteTiO2. The characteristic results show that the addition of sericite can stabilize the crystal phase of TiO2; therefore, the sericite can maintain the crystalline anatase of TiO2 even after the calcination at 700 °C and 900 °C. Accordingly, the adsorption test and the photocatalytic degradation of methylene blue are conducted to verify the photocatalytic performance of the TiO2-sericite composite materials. It indicates that the synergetic effect of TiO2-sericite composites can facilitate the photocatalytic degradation of TiO2 accompanied by the initial adsorption of methylene blue by sericite. Based on the presence of various radicals, including ·OH, ·O2−, and 1O2, the mechanism of photocatalytic degradation of methylene blue via TiO2-sericite composites are successfully proposed. CONCLUSION: The excellent activity reveals that TiO2-sericite composites are with potential employed as ecological-friendly photocatalysts in the degradation of pollutants.
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U2 - 10.1002/jctb.6392
DO - 10.1002/jctb.6392
M3 - Article
AN - SCOPUS:85081728316
SN - 0268-2575
VL - 95
SP - 2715
EP - 2722
JO - Journal of Chemical Technology and Biotechnology
JF - Journal of Chemical Technology and Biotechnology
IS - 10
ER -
